feat(mobile): Skia wave, wave player view, themes and playback settings (M5)

- My Wave is rendered with react-native-skia on the UI thread; physics
  and colour helpers moved to @pipu/core (wave-anim) and shared with web.
- Full-screen player honours ui_prefs.mobile_player (cover / wave).
- Theme switching (dark / light / system) via a theme context and
  useColors() across all screens.
- Profile: theme, wave variant, player view, sound quality sheet
  (Wi-Fi / mobile / downloads), recent-tracks cache clearing on next
  cold start, and a change-password sheet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/core/src/index.ts

@@ -22,3 +22,4 @@ export {
   type Track,
 } from './player';
 export { checkServer, normalizeServerUrl, SERVER_CHECK_TIMEOUT_MS, type ServerCheck } from './server';
+export { initialWaveState, mix, rgb, rgba, step, WAVE_COLORS, waveScale, type Rgb, type WaveState } from './wave-anim';

packages/core/src/wave-anim.ts

@@ -0,0 +1,85 @@
+// Общие формулы кнопки «Моя волна» (docs/design.md#3): состояние, пружины, пульс в такт BPM и цвета.
+// Отрисовка — своя на платформе: Canvas 2D в вебе, Skia на Android. Директива 'worklet' нужна Android,
+// где кадр считается в UI-потоке Reanimated; в вебе это просто строка.
+
+export type Rgb = [number, number, number];
+
+export interface WaveState {
+  hover: number;
+  hoverT: number;
+  press: number;
+  pressV: number;
+  pressT: number;
+  mx: number;
+  my: number;
+  ang: number;
+  t: number;
+  amp: number;
+  pulse: number;
+  speed: number;
+  phase: number;
+  variant: 'orb' | 'liquid';
+  playing: boolean;
+  bpm: number;
+  energy: number;
+  colors: [string, string, string];
+  dark: boolean;
+  reduced: boolean;
+  size: number;
+}
+
+export const WAVE_COLORS: [string, string, string] = ['#2F80FF', '#7C5CFF', '#35D3FF'];
+
+export function initialWaveState(size: number): WaveState {
+  return {
+    hover: 0, hoverT: 0, press: 0, pressV: 0, pressT: 0, mx: 0, my: 0, ang: 0, t: 0, amp: 0, pulse: 0,
+    speed: 1, phase: 0, variant: 'orb', playing: false, bpm: 100, energy: 0.6, colors: WAVE_COLORS,
+    dark: true, reduced: false, size,
+  };
+}
+
+export function rgb(hex: string): Rgb {
+  'worklet';
+  const h = hex.replace('#', '');
+  const full = h.length === 3 ? h[0]! + h[0]! + h[1]! + h[1]! + h[2]! + h[2]! : h;
+  const n = parseInt(full, 16);
+  return [(n >> 16) & 255, (n >> 8) & 255, n & 255];
+}
+
+export function rgba(c: Rgb, a: number): string {
+  'worklet';
+  return `rgba(${c[0]},${c[1]},${c[2]},${a})`;
+}
+
+export function mix(a: Rgb, b: Rgb, k: number): Rgb {
+  'worklet';
+  return [
+    Math.round(a[0] + (b[0] - a[0]) * k),
+    Math.round(a[1] + (b[1] - a[1]) * k),
+    Math.round(a[2] + (b[2] - a[2]) * k),
+  ];
+}
+
+/** Шаг физики: пружины hover / press, амплитуда при игре, пульс в такт BPM (docs/design.md#3). */
+export function step(s: WaveState, dt: number) {
+  'worklet';
+  s.hover += (s.hoverT - s.hover) * 0.08;
+  s.pressV += (s.pressT - s.press) * 0.35;
+  s.pressV *= 0.62;
+  s.press += s.pressV;
+  s.amp += ((s.playing ? 1 : 0) - s.amp) * 0.04;
+  s.speed = s.reduced ? 0.15 : 1 + s.hover * 1.4 + s.amp * 0.7;
+  s.t += dt * s.speed;
+  if (s.playing && !s.reduced) {
+    s.phase = (s.phase + (dt * s.bpm) / 60) % 1;
+    s.pulse += (Math.pow(1 - s.phase, 4) * (0.35 + s.energy * 0.65) - s.pulse) * 0.5;
+  } else {
+    s.pulse += ((s.reduced ? 0 : (Math.sin(s.t * 1.1) * 0.5 + 0.5) * 0.12) - s.pulse) * 0.1;
+  }
+}
+
+/** Масштаб круга: сжатие при нажатии, лёгкое увеличение при наведении. */
+export function waveScale(s: WaveState): number {
+  'worklet';
+  return 1 - s.press * 0.07 + s.hover * 0.02;
+}

packages/i18n/locales/en/common.json

@@ -231,6 +231,21 @@
     "dl_retry": "Retry failed",
     "dl_empty": "Download tracks, albums and likes to listen without a connection",
     "dl_pending_few": "{{count}} tracks queued",
-    "dl_pending_many": "{{count}} tracks queued"
+    "dl_pending_many": "{{count}} tracks queued",
+    "player_view": "Player view",
+    "player_cover": "Cover",
+    "player_wave": "Wave",
+    "quality": "Sound quality",
+    "quality_wifi": "On Wi-Fi",
+    "quality_cellular": "On mobile data",
+    "quality_download": "Downloads",
+    "quality_hint": "The new quality applies to the next tracks; downloaded tracks are not re-downloaded.",
+    "q_original": "Original",
+    "q_high": "High",
+    "q_medium": "Medium",
+    "q_low": "Low",
+    "cache": "Recent tracks cache",
+    "cache_clear": "Clear ({{size}} MB)",
+    "cache_pending": "Will be cleared on next launch"
   }
 }

packages/i18n/locales/ru/common.json

@@ -231,6 +231,21 @@
     "dl_waiting_wifi": "Загрузки ждут Wi-Fi ({{count}})",
     "dl_waiting_network": "Загрузки ждут сеть ({{count}})",
     "dl_retry": "Повторить неудачные",
-    "dl_empty": "Скачивайте треки, альбомы и лайки — они будут доступны без сети"
+    "dl_empty": "Скачивайте треки, альбомы и лайки — они будут доступны без сети",
+    "player_view": "Вид плеера",
+    "player_cover": "Обложка",
+    "player_wave": "Волна",
+    "quality": "Качество звука",
+    "quality_wifi": "По Wi-Fi",
+    "quality_cellular": "По мобильной сети",
+    "quality_download": "Загрузки",
+    "quality_hint": "Новое качество применяется к следующим трекам; уже скачанные не перекачиваются.",
+    "q_original": "Оригинал",
+    "q_high": "Высокое",
+    "q_medium": "Среднее",
+    "q_low": "Низкое",
+    "cache": "Кэш недавних треков",
+    "cache_clear": "Очистить ({{size}} МБ)",
+    "cache_pending": "Очистится при следующем запуске"
   }
 }